Question

I have a text blob and I would like to select URL’s based on whether they have .png or .jpg. I would like to select the entire word based on a pattern.

For example in this blob:

width='17'></a>&nbsp;<a href='http://click.e.groupon.com/?  qs=94bee0ddf93da5b3903921bfbe17116f859915d3a978c042430abbcd51be55d8df40eceba3b1c44e'     style=\"text-decoration: none;\">\n<img alt='Facebook' border='0' height='18'   src='http://s3.grouponcdn.com/email/images/gw-email/facebook.jpg' style='display: i

I’d like to select the image:

http://s3.grouponcdn.com/email/images/gw-email/facebook.jpg

Can I use nokogiri on an html text blob?

Answer 1

Yes, you can use nokogiri, and you should!

Here’s a simple snippet:

require "nokogiri"
str = "....your blob"
html_doc = Nokogiri::HTML(str)
html_doc.css("a").collect{|e| e.attributes["href"].value}.select{|e| e.index(".png") || e.index(".jpeg") }